Automatic train-stop device.



J. H. FORSSBERG.

AUTOMATIC TRAIN STOP DEVICE.

APPLICATION FILED MAY 9, 1914.

Patented Mar. 21, 1916.

3 SHEETS-SHEET I.

Wikmwoeo J. H. FORSSBERG. AUTOMATIC TRAIN STOP DEVICE.

APPLICATION FILED MAY 9. I914.

L176,35?. Patented Mar. 21, 1916.

3 SHEETS-SHEET 2.

@wuemtoz witvwoow J.'H. FORSSBERG. AUTOMATIC TRAIN STOP 'DEVICE. APPLICATION FILED MAY 9. 1914.

1 176 857, Patented Mar. 21, 1916.

3 SHEETS-SHEET 3.

avwemtoz JOHN H. FORSSBERG, OF STEPHENSON, MICHIGAN.

anronaric resin-sacs nnvren masses.

Specification of Letters Patent.

Patented Miami. 21, 191%.

Application filled May 9,1914. Serial No. 837,546.

. To all whom it may esteem.-

Be it known that l, JOHN H. Fonssennc,

a citizen of the United'States, residing at Stephenson, in the county of Menominee and State of Michigan, have invented certain new and useful Improvements in Automatic Train-Stop Devices, of which the fol-- lowing is a specification.

My invention relates to new and useful improvements in electrically operated loco-- motive arresters, and it has particular reference to a system embodying sectional ground conductors designed to close a circuit when .two vcars or engines are in the same block, the circuit when closed operating automatically to actuate suitable mechanism carried upon the respective locomotives within the block to bring the said locomotives to a stand still and in this manner prevent head on collision.

in connection with a system of the above type, the invention aims as its primary object to provide a novel construction, combination and arrangement of parts, details of which will appear in the course of the following description, wherein reference is had to the accompanying drawings forming a part of this specification, like characters of reference designating similar parts throughout the several views, in which 2-- Figure 1 is a side elevation of a locomotive, partly broken away illustrating the arrangement of the operating mechanism in connection therewith; Fig. 2 is an enlarged section on the line 2-2 of Fig. 1; Fig. 3 is a top plan view of the device as illustrated in Fig. 2, that part of the boiler shown in Fig. 2 having been removed; Fig. 4 is a section on the line- 4-4 of Fig. 3; Fig. 5 is a section on the line 5-5 of Fig. 4; and Fig. 6 is a diagrammatic view illustrating the electrical circuit.

Before proceeding with the description of the drawings, I desire to call particular attention ,to the fact that while l ,have evolved my invention with reference to its application in connection with steam'ldcomotives, the same may be readily utilized as a brake means in connection wlth trolley cars, electric cars, and such like common carriers.

Referring now to the drawings by numerals, 1 designates as an'entirety, the locomotive, 2 the steam'chest and 3 the steam supply pipe leading thereinto. Beneath the boiler of the locomotive 1 a suitable platform 4 is arranged,"said platform being held suspended, as illustrated in Fig. 1, through the medium of a plurality of supporting-strips 5, attached, as shown, to the boiler 1. Upon the platform of each locomotive,'a dynamo 6 is arranged, said dynamo being driven as illustrated to advantage in Figs. "land 2 by a chain 7 arranged at one end over a sprocket 8 on the dynamo shaft and at its opposite end over a second sprocket 9 upon the front axle 10 of the locomotive. A motor 11 is also mounted upon said platform 4, the shaft 12 of which, has mounted thereupon, a gear 13, the teeth of-the latter meshing'into the teeth of a'segment ltmounted upon a shaft 15 extending transversely of or across the platform, said shaft being journaled in'certain of the strips 5. Links 16 are fixedly secured to the respective ends of said shaft 15, said links having slots 17 formed in their free ends, within which slots pins 18 of operatingrods 19 work. Therods 19 are connected to slide valves 20 operating within suitable casings 21 open to the inlet pipes 3 of the engine cylinders, which ar-- steam supply to the respective locomotives.

Arms 24 pivoted as at 25'to the under face of platform 4 hang pendently therefrom, the said arms 24 bein tors 11'; conductors 26 eing provided therefor. The rails 23 are also in circuit inith motors lLthrough the medium of conductors 2?, axis 10 and wheels 28'upon said axle. Dynamo 6 is in circuit with an arm 29 pivoted as at 30 to hang pendently from the under face of platform 4, a conductor 31 providing forsuoh circuit; Wheels 32 are carried by the respective arms 24 and 29, the wheels being 1n enga ement with the auxiliary rails or groun' conductors 22. Dynamo 6 is also in circuit, by means of a in circuit with mo-' (til ' ment of the locomotives acted upon; and

locomotive and the motor of conductor 33, with the axle 10, 'car wheels 28 and railway rails 23, this arrangement providing for operation as follows: Should locomotives travelin g'in o posite directions enter the same block, the-circuit between the dynamo 6 of one locomotive, and the motor 11 of the otherlocomotive, is closed, and, as the respective motors of the said two locomotives each operate to turn the shafts 15 carried thereby, it is apparent that the valves 20 of the respective locomotives will be actuated to close the steam supply to the locomotive cylinders and thus'prevent continued running of the locomotives. Arm 24 of one locomotive being engageable 'withrail 22, and arm 29 of the locomotive traveling in the opposite direction being in engagement with the same rail, it is apparent that the electric circuit between the dynamo of one the other locomotive is closed. K

From the foregoing, taken in connection with the accompanying drawings it is apparentthat the dynamos of the respective locomotives will be recharged through rotation of axle 10; that the operation of the device is positive, certain and automatic, said operation being controlled by. the movethat in actual practice, suitable means may be provided and controlled from a point within the locomotive cab, to break theelectric circuit, and provide for a return of the valves 20 to their normal position whereby steam inlet pipes 3 of the respective locomotives may be again opened.

tion and arrangement of parts may be s'orted'to, when required, without sacrific ing 'any of the advantages. of my invention,

as defined in the appended claim.

Havin thus fully described my invention;

what I c aim as new and desire to secure by Letters Patent, is

In a railway safety appliance of the char acter described, 7 the combination with a track and sectional electrical conductors arranged along the same, of vehicles totravel over the track, electrical contact devices carried by eachvehicle and engaging. said conmotor of one vehicle being engageable with the same electrical conductor as the dynamo of the approaching vehicle upon the movement of the two vehicles onto the same track section defined by the sectional electrical conductors, means electrically connecting the dynamo and the motor of the respective vehicles with the respective track rails to complete the circuit upon movement as aforesaid, a shaft mounted on each vehicle, a segment mounted on each shaft, said segment being driven through the agency of the motor when energized upon the closing of the electrical circuit, means to. drive each motor through movement of the vehicle on which itis arranged, and means to "control movement of the valve through operation of the shaft.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN H. FORSSBERG.

Witnesses:

JOHN E. FoRssBnRo, PETER FORSSBERG. 

